Apple has released iPhoto ’11 9.2.3, which fixes an issue where iPhoto could crash when running on a Mac system with multiple user accounts. Aside from that, the update offers only the standard trope of “improves overall stability.” ($14.99 new from the Mac App Store, free update through Software Update or the Mac App Store, 256.9 MB via Software Update or 354.55 MB via Apple’s support page)
Two Shortcuts for App Exposé
If you want to see all the windows for a particular app via App Exposé, there are two hidden shortcuts. For either, start by pressing Command-Tab to bring up the app switcher. Then, while still holding down the Command key, press either the 1 key or the up arrow. That puts you into App Expose mode, with all of an app's windows showing, and recent documents in a row across the bottom of the screen. Let up on the Command key, and then you can press Tab to cycle through all the running apps.